Two students of Tibetan ethnic group are seen on the train of Z6802 from Lhasa to Xining on Jan. 11, 2019. As the Chinese Lunar New Year is drawing near, the train of Z6802 from Lhasa of southwest China's Tibet Autonomous Region to Xining of northwest China's Qinghai Province is crowded with tourists, workers, students and pilgrims. (Phots: Xinhua)

Passengers are seen on the train of Z6802 from Lhasa to Xining on Jan. 11, 2019. As the Chinese Lunar New Year is drawing near, the train of Z6802 from Lhasa of southwest China's Tibet Autonomous Region to Xining of northwest China's Qinghai Province is crowded with tourists, workers, students and pilgrims.

A passenger from Xigaze, southwest China's Tibet Autonomous Region, looks out of the window on the train of Z6802 from Lhasa to Xining on Jan. 11, 2019. As the Chinese Lunar New Year is drawing near, the train of Z6802 from Lhasa of southwest China's Tibet Autonomous Region to Xining of northwest China's Qinghai Province is crowded with tourists, workers, students and pilgrims.

A train conductor helps an elder wearing oxygen hose on the train of Z6802 from Lhasa to Xining on Jan. 11, 2019. As the Chinese Lunar New Year is drawing near, the train of Z6802 from Lhasa of southwest China's Tibet Autonomous Region to Xining of northwest China's Qinghai Province is crowded with tourists, workers, students and pilgrims.